RS232 connectors

RS232 interfaces can be used to connect a PC to STK1000. This is particularly useful when communicating with the U-boot boot loader and Linux when these run on STK1000.

Two RS232 connectors are available to the user. A dual RS232 level converter provide proper voltage levels for compliance to the RS232 standard. Three jumper settings are used to select where UART signals are used.

Image:STK1000RS232connector.jpg

Signals

The default settings when communicating with U-boot and Linux are listed below. U-boot is programmed onto the external flash by default. The Linux distribution will normally reside on a SD memory card.

Setting Value
Baud rate 115200
Data 8 bit
Parity none
Stop 1 bit
Flow control none

Block diagram

The block diagram shows jumper settings set to use the RS232 level converter.

Image:STK1000RS232BlockDiagram.gif

Interfaces

Refer the help files of the daughter board to find out what interfaces are used and which peripheral on the processor are connected to the interface.